What do you think of a fighter who uses Intelligence as a secondary stat?

With a bonus to damage rolls instead of attack rolls of opportunity attacks, the difference becomes more noticeable with a smaller weapon. Is this an equally good option, though?

How is getting +4 instead of +2 for combat advantage? I thought it was too much at first and was going to make it +3, but then I realized that this is clearly a weaker option than having a +1 bonus all the time with Fighter Weapon Talent. So I think the situational +2 bonus to attack rolls will be not too strong and really fun to use.